Improvement in machines for threading screw-blanks



} 3Sheets--Sheeth E. NUGENT & FA-NNING.

Machines for Threading Screw-Blanks. No.145,12l. Patented Dec-2,1873.

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v 3Sheets--Sheet2. E. NUGENT & J. FANNING.

Machines for Threading Screw-Blanks. N0. 145,12]. Patented Dec.2,1873.

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IWITNES8E8= INVENTORS:

3She'ets--Sheet 3. FAN N N G.

E. 'NUGENT &-J. Machines for Threading Screw-Blanks. No. 145,121.

Patented Dec. 2,1873.

INVENTORS;

"UNITED STATES PATENT QFFIcn EDWARD NUGENT' AND JOHN FANNING, orBROOKLYN, NEW YORK.

IMPROVEMENT IN MACHINES-FGR THREADING SCREW-BLANKS.

Specification forming part of Letters Patent No. 145, 12 I datedDecember 2, 1873; application filed October 29, 1873. I

To all whom it may concern:

Be it known that we, EDWARD NUGENT and JOHN FANNING, both of the city ofBrooklyn, in Kings county, State of New York, have invented a Machinefor Cutting Screws, of which the following is a specification:

The object of our invention is to furnish a machine for cutting threadson screw-blanks, which shall be capable of accomplishing much more workin a given time than any hitherto made, and to be much more simple andless liable to get out of order.

Our machine is so constructed that it will successfully cut and finishtwo or more screws at the same time.

Our invention will be readily understood by reference to theaccompanying drawings,'which form a part of this specification.

Figure 1 is a plan or top view of our machine. Fig. 2 is a side view,and Figs. 3 and A are cross-sectional views, of our machine.

A is the main or driving shaft. B is a pinion, which operates aspur-wheel, 0, thereby communicating motion to the cam D. E is a slidingbar, which takes its motion from the cam 1) by means of a projection, F,entering the cam-slot; The sliding bar E has a projection, G, that worksin a cam, H, giving to said cam H intermittent rotary motion. Thesliding bar E has cam-shaped sides J J, which pass through rectangulargrooves in the sides of the frame K K. The cam H has its center bearingsin the frame K K; consequently the cam H is moved sidewise with theframe. I is a disk attached to the end of the cam H, and moved with it.L is a hopper, into which the blanks are put. This hopper is deeper inits center than at its sides, so that the blanks have a tendency to falltoward the center. There is a slot, M, through the bottom of the hopper,through which an oscillating receiver, N, is made to move, and, by itsmotion, catch the blanks as they fall in position, and pass them forwardto the race 0. The heads of the blanks, being always the largestand-heaviest, naturally fall to the center of the hopper, and, the slotM extending radially from the center toward the side of the race 0, theblanks arealways caught with their points or small ends downward,keeping the race 0 filled with blanks, which gravitate toward the diskI,

which is provided with half=roui1d receiving slots 1, into which thescrew=blanks fall as the slots are, by the rotary motion of the disk I,alternately brought under the discharge end of the race 0. The race 0 isconnected or hung by an arm, q, having a fork that embraces a pin on oneof the side frames, in such a manner that it moves with the side motionof the disk. A guard, N, is attached to the lower end of the race 0, andrests against the side of the disk I, to hold the blanks in positionwhile they are passed to the cutter as the disk I rotates, carrying theblanks forward opposite a stationary rest, Q. At this junction theinclines J J on the sliding bar E presses the frame K K forward, causingthe disk I to move toward the stationary rest Q, and grasp the blankfirmly against the rest. The same motion carries a steady pin, R,forward against the side-of the disk 1, holding the disk firmly inposition while the thread is being cut on the blank by cutters X X, madefast on the shafts W 'W. A cam, S, on the shaft D acts againstavtransverse sliding bar, T, forcing it against levers V V, which arefast to and projecting from the shafts W W, to which is given a rockingmotion, to force the point of the cutters X X against the blank. Agear-wheel, Z, on the main shaft gives motion to a gear-wheel, Y, on theside of which is a cam, Z, which gives longitudinal motion to the shaftsW W, to which the cutters are fastened, one of the shafts being acted onand transmits motion to the other by the arms a" m. A gear-wheel, d, onthe main shaft meshes into gear-wheels on the screw-drivers I) 11,causing the screw-drivers to revolve. An arm, 0, attached to the bar E,extends to and enters grooves around the ends of the screw-drivers,causing them to move longitudinally with the bar E. The longitudinalmotion given to the screwdriver is to force their points into the nickin the heads of the blanks. The blanks are revolved by the screw-driversagainst the action of the cutters X X. The longitudinal motion of theshafts W V is to traverse the cutters along the blanks, and give theproper size and pitch to the screw-thread. As the disk I revolves, theblanks drop from the race 0 into the slots P, and are carried forwardopposite the cutters X X. The sliding bar E now moves forward, bringingthe steadypin in place to hold the disk I from revolving, and theinclines J J force the frame K K forward, carrying the disk I sidewisetoward the cutters X X, and pressing the blanks against the stationaryrest Q. The continued forward motion of the bar E moves thescrew-drivers so far, longitudinally, as to force their points into thenicks in the heads of the blanks, causing the blanks to revolve againstthe action of the cutters X X. The cutter-points are forced against theblanks by means of the sliding bar T acting against the levers V V,projecting from the shafts 'W W, giving to said shafts a rockin motion.At this juncture the cam on the side of the gear-wheel. Y acts againstthe ends of the shafts WV W, causing them to move longitudinally, thuscausing the cutters X X to traverse the length of the screw-blank fourtimes, it being each time forced back by a coiled spring.

Formers U U are attached to the ends of the sliding bar T, which actagainst setscrews passing through the levers V V, and cause the cuttersX X to move farther forward as they approach the end of the blank, bywhich means a gimlet-point is given to the screw.

IVhen the screw is finished, the continued motion of the machinewithdraws the disk I and releases the screw, which is dropped into areceptacle below.

Having thus described our machine, what we claim as new, and desire tosecure by Letters Patent, is-

1. The double-acting cam H, in combination with the disk I, cutters X X,and revolving screw-drivers b b, constructed and operating as and forthe purpose set forth.

. 2. The combination of the sliding bar E provided with the projectionsF G, inclines J J, and steady-pin It, with the cams H D, disk I,

and the sliding frame K K, operating substan-.

tially as and for the purpose set forth.

3. The carrying-disk I, having a transverse movement to clasp thescrew-blank while hein g threaded,-and an intermittent rotary movementto present more blanks for the action of the cutters, substantially asand for the purpose set forth'.

4. The disk I, sliding frame K K, and bar E, operated as described, incombination with the screw-drivers b b and cutters X X, as and for thepurpose set forth.

5. The combination and arrangement of the sliding bar T, having theformers U U, with the levers V V, carrying set-screws X X, shafts V W,traversing arms X X, and cutters X X, substantially as and for thepurpose set forth.

6. In combination with the disk or carrier I in a screw-machine, theoscillating race 0, arranged and operated as set forth.

EDWARD NUGENT. JOHN FANNING.

Witnesses:

A. MOORE, H. S. MILLER.

